Bypassing Coils
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Senior User
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From: Mississippi
Bypassing Coils
Has anyone tried to do away with coil packs and convert the 5.4 back to a single coil? It seems like all you would have to do is to tie each lead into the lead on the single coil but i'm not sure if that would actually work. Just a thought.
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yeah, a LOT of work would have to be done, starting with pulling the engine...new camshaft...distributer...carberator...the computer wouldn't know what to do...you'd have to revert back to a 70's power train...besides, why would you want to have a single point of failure...with one coil, if it goes bad...it won't run. At least with the COP setup, if a coil goes bad, you still have 7 cylinders running (why do you think it was built this way...redundency and reduced failure rate)
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Joined: Nov 2001
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From: OK
Although I agree that it's not worth the effort, many mid-to-late '90s vehicles used an electronic distributor... including the early Expeditions w/4.6L engine. So, you wouldn't have to revert back to technology of the '70s, but it would still be a nightmare to attempt.
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those coil packs (as in my Explorer and Taurus) may still require a different camshaft, or at least camshaft positioning sensor. But at the very least, would require reprogramming of the OBDII computer...and I doubt anyone has written THAT program.
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From: Mississippi
blwilli
I have to disagree about the 8 coil packs versus the old single coil. Having put well over 1,000,000 mile traveling for the last 23 years, having owned many different cars and trucks, I have never had a coil fail and leave me stranded. In fact I've only had one that even developed a misfire and it was only ocasionally. After being apart on this forum for 6 months and reading about all the coil failures on these multi-coil trucks I don't agree that more is better.
I have to disagree about the 8 coil packs versus the old single coil. Having put well over 1,000,000 mile traveling for the last 23 years, having owned many different cars and trucks, I have never had a coil fail and leave me stranded. In fact I've only had one that even developed a misfire and it was only ocasionally. After being apart on this forum for 6 months and reading about all the coil failures on these multi-coil trucks I don't agree that more is better.
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From: South...
Originally Posted by mapman
blwilli ...
After being apart on this forum for 6 months and reading about all the coil failures on these multi-coil trucks I don't agree that more is better.
After being apart on this forum for 6 months and reading about all the coil failures on these multi-coil trucks I don't agree that more is better.
Seems to me like a distributor, coil and plain old plug wires were a better (more reliable setup) - you can buy a set of plug wires for a V8 cheaper than one COP and I've never had a coil go bad either...but I DID experience the TFI module failure on my 86 Mustang GT - that was just a faulty design from the word GO.
I'm sure many will disagree...everybody has their own view
